(19)

(11)

EP 0 961 650 A1

(12)

(43) Date of publication: 08.12.1999 Bulletin 1999/49 (21) Application number: 98903168.0 (22) Date of filing: 09.02.1998

(51) International Patent Classification (IPC):  B01D 46/ 02( . ) B01D 46/ 06( . ) (86) International application number: PCT/GB1998/000399 (87) International publication number: WO 1998/036819 (27.08.1998 Gazette 1998/34)

(84) Designated Contracting States: DE FR GB (30) Priority: 20.02.1997 GB 19970003502 (71) Applicant: SCAPA GROUP PLC Blackburn, Lancashire BB2 6AY (GB)	(72) Inventors: HAES, Robert, Lawrence D-38259 Salzgitter (DE) BRINKMANN, Heiko D-38259 Salzgitter (DE) (74) Representative: Phillips, Patricia Marie, et al  Wilson Gunn M'Caw, 41-51 Royal Exchange, Cross Street Manchester M2 7BD Manchester M2 7BD (GB)